Quiz

1. Chlorite compounds are extremely explosive when they come into contact with combustible material. The formula of the chlorite ion is:

ClO₂^-

ClO₃^-

ClO^2-

HClO₃^-

ClO₂^-2

2. An old bottle labelled "sodium biphosphate" contains:

Na₂HPO₄

Na₃PO₄

NaH₂PO₃

NaH₂PO₄

NaHPO₃

3. Dichromate ions are used in the tanning of leather. Dichromate ion is:

CrO₄^2-

HCrO₄^-

Cr₂O₃^2-

HCrO₃^-

Cr₂O₇^2-

4. Deadly lead(II) acetate is sometimes called "sugar of lead" because it has a very sweet taste; it was once used to sweeten wine! Lead(II) acetate is written as:

PbCO₃

PbC₂H₃O₂

Pb(C₂O₄)₂

Pb(C₂H₃O₂)₂

PbC₂O₄

5. If the selenate ion has formula SeO₄^2-, the selenite ion might be:

SeO₄^3-

SeO₄^-

SeO₄⁺²

SeO₃^2-

SeO₅^2-

6. Phosphate ion is a basic building block of minerals, bones, teeth, and DNA. The formula of the phosphate ion is:

PO₄^3-

PO₃^-

PhO₂^-2

HPO₄^-2

PO₄^2-

7. Sodium peroxide can be used for oxygen generation in diving bells and submarines, since it reacts with carbon dioxide and produces oxygen gas. The peroxide ion has the formula:

O₃^-

O₂^2-

O₂^-

O₂⁺

O^2-

8. Nitrite ion is used in bleaching, dyeing and printing fabrics. The formula of the nitrite ion is:

NO₃^-

NO₄^2-

HNO₄^-

NO₂^-

N₂O₃^-2

9. Veterinarians administer an 0.2 percent potassium permanganate solution to cows and horses as an antidote for plant alkaloid poisoning. A bottle that contains potassium permanganate solution might be labelled:

KMnO₃

K₂MnO₃

KMnO₄

KMgO₄

K₂MnO₄

10. Sodium sulfate occurs in nature as the minerals mirabilite and thenardite. The formula of the sulfate ion is:

SO₃^2-

HSO₄^-

SO₄^2-

S₂O₃^-2

SO₄^-

General Chemistry Online! Quiz